Fix parsing of gl_FrontLightModelProduct.sceneColor, don't segfault on variable array indexes.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/mesa/shader/slang/slang_emit.c b/src/mesa/shader/slang/slang_emit.c
index 41646af387a..f180fb949ab 100644
--- a/src/mesa/shader/slang/slang_emit.c
+++ b/src/mesa/shader/slang/slang_emit.c
@@ -1486,6 +1486,10 @@ emit_struct_field(slang_emit_info *emitInfo, slang_ir_node *n)
 {
    if (n->Store->File == PROGRAM_STATE_VAR) {
       n->Store->Index = _slang_alloc_statevar(n, emitInfo->prog->Parameters);
+      if (n->Store->Index < 0) {
+         slang_info_log_error(emitInfo->log, "Error parsing state variable");
+         return NULL;
+      }
    }
    else {
       GLint offset = n->FieldOffset / 4;